CN105299298B - A two-position two-way solenoid valve with improved structure - Google Patents

Abstract

The invention discloses a two-position two-way electromagnetic valve with an improved structure, which comprises a valve body and a pilot assembly, wherein an air guide hole is arranged in the valve body, the pilot assembly comprises a sleeve, a first connecting part extends from the top end of the valve body, a second connecting part extends from the bottom end of the sleeve, the first connecting part and the second connecting part are fixedly connected through a bolt, a threaded part is arranged on the outer wall of the bolt and is formed by matching a left-handed thread and a right-handed thread which are correspondingly arranged, a fastening nut matched with the left-handed thread and a locking nut matched with the right-handed thread are connected to the bottom end of the bolt, the valve body is also provided with a valve hole, the inner end of the valve hole is communicated with the air guide hole, a check valve is arranged in the middle of the valve hole, the. The invention has the advantages of simple and reasonable structure, convenient and quick installation, lower manufacturing cost, better pressure stabilizing effect, stable and reliable connecting structure between the valve body and the sleeve and longer service life.

Description

A two-position two-way solenoid valve with improved structure

technical field

The invention relates to the technical field of valves, in particular to a two-position two-way solenoid valve with an improved structure.

Background technique

Valve products are widely used in fluid control in various technical fields, and the two-position two-way solenoid valve is one of them, which is well known and common. The structure of the common two-position two-way solenoid valve currently on the market usually includes a valve body, which is respectively provided with an air inlet and an air outlet. There is a pilot assembly for controlling the conduction or cutoff of the passage between the air guide hole and the air inlet. When the pilot component is energized, the moving iron core of the pilot component is affected by the magnetic attraction and moves away from the air guide hole, so that the input end of the air guide hole is conducted, and a gas passage is formed between the air inlet, the air guide hole and the air outlet. The gas in the air port flows to the air outlet; when the pilot component is powered off, the moving iron core resets under the action of the moving iron core spring and is in sealing contact with the air guide hole, so that the input end of the air guide hole is blocked. Gas cannot flow to the gas outlet.

However, the existing two-position two-way solenoid valve usually has the following defects due to unreasonable structural settings: First, because the air inlet is connected to the air source, when the air pressure of the air source is unstable, it is easy to cause the air outlet to be damaged. Air pressure fluctuations, especially when the pressure at the air inlet is higher than the rated air pressure of the gas-consuming equipment, will seriously affect the stability of the working performance of the gas-consuming equipment, and even cause damage to the gas-consuming equipment. In order to solve this problem, the more commonly used The method is to set a pressure stabilizing valve between the air source and the air inlet, but the use of the stabilizing valve will not only make the pipeline structure setting complicated, but also increase the cost of use; secondly, the valve body and the sleeve of the pilot assembly The setting of the installation connection structure is unreasonable. Specifically, at present, the valve body and the sleeve usually adopt two connection structures. One is to set the valve plate fixedly connected with the valve body, and press the bottom end of the sleeve on the valve plate. Between the valve body and the valve body, the defect of this installation method is that the installation structure is complicated, which makes the installation more cumbersome and inconvenient; the other is to extend the external thread connection part at the bottom end of the casing, and the casing pipe connects with the valve body through the external thread connection part. Fixed connection, the advantage of this installation method is that the structure is simple and the installation is quick, but the disadvantage is that due to the high air pressure in the valve cavity of the valve body, under the long-term vibration and impact of high-pressure gas, the gap between the casing and the valve body The threaded connection structure tends to loosen easily, resulting in an unstable connection between the sleeve and the valve body, which affects the service life of the valve.

Contents of the invention

The object of the present invention is to aim at the defects and deficiencies of the prior art, and provide a two-position two-way solenoid valve with an improved structure, which has a simple and reasonable structure, convenient and fast installation, low manufacturing cost, and good voltage stabilizing effect. The connection structure between the casings is stable and reliable, and the service life is long.

To achieve the above object, the present invention adopts the following technical solutions:

A two-position two-way solenoid valve with an improved structure according to the present invention includes a valve body, the valve body is respectively provided with an air inlet and an air outlet, and the valve body is provided with an air guide hole communicating with the air outlet, so The valve body is provided with a pilot assembly for controlling the conduction or cut-off of the passage between the air guide hole and the air inlet, and the pilot assembly includes a sleeve fixedly connected to the valve body;

The valve body is also provided with a valve hole, the inner end of the valve hole communicates with the air guide hole, the middle part of the valve hole is provided with a one-way valve, the outer end of the valve hole is fixedly connected with a valve seat, and the valve hole The seat is provided with fine holes, and the valve hole communicates with the atmosphere through the fine holes, and a pressure relief valve is arranged in the valve seat;

The one-way valve includes a first fixed seat and a first valve cover corresponding to the first fixed seat, the first fixed seat is in interference fit with the inner wall of the valve body, and the first fixed seat is provided with a first passage hole, a first steel ball corresponding to the first through hole is provided between the first through hole and the first valve cover, and a long spring is arranged between the first valve cover and the valve seat;

The pressure relief valve includes a second fixed seat and a second valve cover corresponding to the second fixed seat. Both the second fixed seat and the second valve cover are in interference fit with the inner wall of the valve seat. The second valve cover A second through hole is provided on the second fixed seat, and a third through hole corresponding to the second through hole is provided on the second fixed seat. The third through hole communicates with the atmosphere, and the second valve cover and the second fixed seat A second steel ball and a short spring are sequentially arranged between them, and the second steel ball is in sealing contact with the second through hole under the elastic force of the short spring;

A first connecting portion is extended from the top end of the valve body, a second connecting portion corresponding to the first connecting portion is extended from the bottom end of the sleeve, and a pressure is set between the first connecting portion and the second connecting portion. There is an annular gasket, and the first connection part, the annular gasket and the second connection part are fastened and connected by bolts, and the outer wall of the bolt is provided with a threaded part, and the threaded part is composed of corresponding left-handed threads and right-handed threads. The bottom end of the bolt protrudes from the outside of the first connecting part, and the bottom end of the bolt is connected with a fastening nut that cooperates with the left-handed thread and a lock nut that cooperates with the right-handed thread, The fastening nut is arranged between the first connecting part and the locking nut.

Further, the pilot assembly also includes a static iron core, a moving iron core and a coil assembly, a static iron core is fixed inside the sleeve, and a valve cavity is formed by cooperation between the valve body, the sleeve and the static iron core, Both the air inlet and the air guide hole are in communication with the valve chamber, the moving iron core is movably arranged in the valve chamber, a moving iron core spring is arranged between the moving iron core and the static iron core, and the moving iron core The bottom end of the casing is fixedly connected with a sealing plug sealingly fitted with the air guide hole, and the coil assembly is arranged on the outside of the casing.

Further, the outer wall of the moving iron core is provided with several air guiding grooves in the axial direction, and the air guiding grooves penetrate both ends of the moving iron core.

Further, the pores have a diameter of 1-3 mm.

Further, the annular sealing gasket is made of rubber material, and the thickness of the annular sealing gasket is 5-8 mm.

The beneficial effects of the present invention are: the two-position two-way solenoid valve provided by the present invention, by setting a valve hole connected to the air guide hole on the valve body, a one-way valve is set in the middle of the valve hole, and a valve seat is set at the outer end of the valve hole , and set fine holes and pressure relief valves in the valve seat respectively. Under working conditions, when the air pressure in the air inlet is higher than the rated air pressure of the gas equipment, the one-way valve is firstly turned on due to the high pressure, so that the air inlet in the air inlet Part of the pressure enters the valve hole through the air guide hole and is discharged to the atmosphere through the pores of the valve seat. When the air pressure in the air inlet continues to rise, the air pressure in the valve hole also rises correspondingly, so that the pressure relief valve is turned At this time, the gas in the valve hole is discharged to the atmosphere from the fine hole and the pressure relief valve at the same time, so as to realize rapid pressure relief. The invention has lower manufacturing cost and better voltage stabilizing effect.

In addition, the present invention provides a threaded portion composed of corresponding left-handed threads and right-handed threads, and connects a fastening nut that cooperates with left-handed threads and a lock nut that cooperates with right-handed threads at the bottom end of the bolt, Not only the structure is simple, but also the installation is convenient and fast, and when the fastening nut squeezes the first connecting part, since the loosening and retreating direction of the fastening nut is the same as the tightening direction of the locking nut, the fastening nut cannot be loosened, ensuring The extrusion pressure of the fastening nut on the first connecting part makes the first connecting part, the annular gasket and the second connecting part always under pressure, thereby ensuring the stability of the connecting structure between the casing and the valve body performance and reliability, prolonging the service life of the present invention.

Description of drawings

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is a schematic diagram of an enlarged structure at A in Fig. 1;

FIG. 3 is a schematic diagram of an enlarged structure at B in FIG. 1 .

In Figure 1 to Figure 3:

1. Valve body; 11. Air inlet; 12. Air outlet; 13. Air guide hole; 14. Valve hole; 15. First connecting part; 21. Sleeve; 211. Second connecting part; 22. Static iron core ; 23, moving iron core; 231, sealing plug; 232, air guiding groove; 24, coil assembly; 25, moving iron core spring; 3, valve cavity; 41, first fixed seat; 411, first through hole; 42 , the first valve cover; 43, the first steel ball; 44, the long spring; 5, the valve seat; 51, the fine hole; 52, the second fixed seat; 521, the third through hole; , the second through hole; 54, the second steel ball; 55, a short spring; 6, an annular gasket; 7, a bolt; 71, a threaded portion; 8, a fastening nut; 9, a lock nut.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

A two-position two-way solenoid valve with an improved structure as shown in Figures 1 to 3 includes a valve body 1, the valve body 1 is respectively provided with an air inlet 11 and an air outlet 12, and the valve body 1 is equipped with There is an air guide hole 13 communicating with the air outlet 12 , and the valve body 1 is provided with a pilot assembly for controlling the conduction or cutoff of the passage between the air guide hole 13 and the air inlet 11 .

The pilot assembly includes a sleeve 21, a static iron core 22, a moving iron core 23 and a coil assembly 24. The bottom end of the sleeve 21 is fixedly connected to the valve body 1. Specifically, the top end of the valve body extends with The first connecting part 15, the second connecting part 211 corresponding to the first connecting part 15 is extended from the bottom end of the sleeve, and a ring shaped ring is pressed between the first connecting part 15 and the second connecting part 211. The sealing gasket 6, in order to fully ensure the sealing performance of the present invention, the annular sealing gasket 6 is made of rubber material, and the thickness of the annular sealing gasket 6 is 5-8 mm. The first connecting part 15, the annular gasket 6 and the second connecting part 211 are fastened and connected by bolts 7, and the outer wall of the bolt 7 is provided with a threaded part 71, and the threaded part 71 is composed of corresponding left-handed threads and The right-handed thread fits, the bottom end of the bolt 7 protrudes from the outside of the first connecting part 15, and the bottom end of the bolt 7 is connected with a fastening nut 8 that cooperates with the left-handed thread, and a fastening nut 8 that cooperates with the right-handed thread. The lock nut 9 is provided, and the fastening nut 8 is arranged between the first connecting portion 15 and the lock nut 9 .

In the present invention, a threaded portion 71 formed by matching left-handed threads and right-handed threads is provided, and a fastening nut 8 that cooperates with left-handed threads and a lock nut that cooperates with right-handed threads are connected at the bottom end of bolt 7 9. Not only the structure is simple, the installation is convenient and fast, but also when the fastening nut 8 squeezes the first connecting part 15, since the loosening direction of the fastening nut 8 is the same as the tightening direction of the locking nut 9, the fastening The nut 8 cannot be loosened, which ensures the extrusion pressure of the fastening nut 8 to the first connecting part 15, so that the first connecting part 15, the annular gasket 6 and the second connecting part 211 are always in a pressurized state, thereby ensuring The stability and reliability of the connecting structure between the casing and the valve body are improved, and the service life of the present invention is prolonged.

The static iron core 22 is fixed inside the casing 21, the valve body 1, the casing 21 and the static iron core 22 are matched to form a valve cavity 3, and the air inlet 11 and the air guide hole 13 are both It communicates with the valve cavity 3, and the moving iron core 23 is movable in the valve cavity 3. A moving iron core spring 25 is arranged between the moving iron core 23 and the static iron core 22. The bottom of the moving iron core 23 The end is fixedly connected with a sealing plug 231 sealingly fitted with the air guide hole 13 , and the coil assembly 24 is arranged on the outside of the casing 21 . The outer wall of the moving iron core 23 is axially provided with several air guide grooves 232, and the air guide grooves 232 run through the two ends of the moving iron core 23. When the moving iron core 23 moves toward the static iron core 22 under the action of magnetic force, At this time, the gas between the moving iron core 23 and the static iron core 22 will flow to the bottom of the moving iron core 23 through the air guide groove 232, thereby ensuring the stability of the moving iron core 23 movement.

The working principle of the pilot assembly in the present invention is the same as that of the existing two-position two-way solenoid valve, so it will not be repeated here.

The valve body 1 is also provided with a valve hole 14, the inner end of the valve hole 14 communicates with the air guide hole 13, the middle part of the valve hole 14 is provided with a check valve, and the outer end of the valve hole 14 is fixedly connected with a Valve seat 5, the valve seat 5 is provided with a fine hole 51, preferably, in order to ensure the pressure relief effect of the present invention, the hole diameter of the fine hole 51 is 1 to 3 mm, and the valve hole 14 passes through the fine hole 51 It communicates with the atmosphere, and a pressure relief valve is arranged in the valve seat 5 .

The one-way valve includes a first fixed seat 41 and a first valve cover 42 corresponding to the first fixed seat 41. The first fixed seat 41 is in interference fit with the inner wall of the valve body 1. The first fixed seat 41 A first through hole 411 is provided on the top, and a first steel ball 43 corresponding to the first through hole 411 is arranged between the first through hole 411 and the first valve cover 42. The first valve cover 42 and the first valve cover 42 A long spring 44 is provided between the valve seats 5;

The pressure relief valve includes a second fixed seat 52 and a second bonnet 53 corresponding to the second fixed seat 52, the second fixed seat 52 and the second bonnet 53 are in interference fit with the inner wall of the valve seat 5, The second valve cover 53 is provided with a second through hole 531, and the second fixing seat 52 is provided with a third through hole 521 corresponding to the second through hole 531, and the third through hole 521 communicates with the atmosphere. , between the second valve cover 53 and the second fixing seat 52, a second steel ball 54 and a short spring 55 are sequentially provided, and the second steel ball 54 is connected to the second through hole 531 under the elastic force of the short spring 55 Sealed contacts.

The working principle of the present invention is: when the pilot assembly is energized (that is, the moving iron core 23 is away from the air guide hole 13 under the action of magnetic attraction, and the air inlet 11 is connected to the air guide hole 13), when the air pressure in the air inlet 11 is stable , the air pressure in the valve hole 14 is less than the elastic force of the long spring 44, the first steel ball 43 is in sealing fit with the first through hole 411, the check valve and the pressure relief valve are both in the closed state, and the gas in the air inlet 11 is in turn Flow through the air guide hole 13 and the air outlet 12 to the gas equipment; when the pressure of the air inlet 11 is higher than the rated air pressure of the gas equipment, because the inner end of the valve hole 14 communicates with the air guide hole 13, the inner end of the valve hole 14 The air pressure also rises accordingly. At this time, the gas at the inner end of the valve hole 14 squeezes the first valve cover 42 through the first steel ball 43, the long spring 44 is compressed, the one-way valve is turned on, and the gas at the inner end of the valve hole 14 passes through the first valve cover 42. The slit between a fixed seat 41 and the first valve cover 42 flows to the middle part of the valve hole 14, and continues to be discharged to the atmosphere through the fine hole 51 of the valve seat 5, and realizes preliminary pressure relief at this moment; When the pressure increases further, the air pressure in the middle of the valve hole 14 gradually rises. At this time, the gas in the middle of the valve hole 14 squeezes the short spring 55 through the second steel ball 54, the short spring 55 is compressed, the pressure relief valve is turned on, and the valve Part of the air pressure in the middle of the hole 14 is discharged through the fine hole 51, and the other part is discharged through the second through hole 531 and the third through hole 521, so as to realize rapid pressure relief; when the pressure of the air inlet 11 returns to normal, the one-way valve and the The pressure relief valve closes again under the action of the corresponding spring. The present invention achieves the effect of stabilizing voltage by circulating the above operations during operation.

The above is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims (5)

1. A two-position two-way solenoid valve of an improved structure, comprising a valve body (1), the valve body (1) is respectively provided with an air inlet (11) and an air outlet (12), and the valve body (1) ) is provided with an air guide hole (13) communicated with the air outlet (12), and the valve body (1) is provided with a valve for controlling the conduction or cut-off of the passage between the air guide hole (13) and the air inlet (11). The pilot assembly, the pilot assembly includes a sleeve (21) fixedly connected to the valve body (1), characterized in that: The valve body (1) is also provided with a valve hole (14), the inner end of the valve hole (14) communicates with the air guide hole (13), and the middle part of the valve hole (14) is provided with a one-way valve. The outer end of the valve hole (14) is fixedly connected with a valve seat (5), and the valve seat (5) is provided with a fine hole (51), and the valve hole (14) communicates with the atmosphere through the fine hole (51), A pressure relief valve is arranged in the valve seat (5); The one-way valve includes a first fixed seat (41), a first valve cover (42) corresponding to the first fixed seat (41), and the first fixed seat (41) passes through the inner wall of the valve body (1). Fittingly, the first fixed seat (41) is provided with a first through hole (411), and a first through hole (411) is provided between the first through hole (411) and the first valve cover (42). 411) the corresponding first steel ball (43), and a long spring (44) is arranged between the first valve cover (42) and the valve seat (5); The pressure relief valve includes a second fixed seat (52), a second valve cover (53) corresponding to the second fixed seat (52), and both the second fixed seat (52) and the second valve cover (53) Interference fit with the inner wall of the valve seat (5), the second valve cover (53) is provided with a second through hole (531), the second fixed seat (52) is provided with a second through hole ( 531) corresponding to the third through hole (521), the third through hole (521) communicates with the atmosphere, and the second steel valve cover (53) and the second fixing seat (52) are sequentially provided with second steel A ball (54) and a short spring (55), the second steel ball (54) is in sealing contact with the second through hole (531) under the elastic force of the short spring (55); The top end of the valve body (1) is extended with a first connecting portion (15), and the bottom end of the sleeve (21) is extended with a second connecting portion (211) corresponding to the first connecting portion (15), An annular gasket (6) is pressed between the first connecting portion (15) and the second connecting portion (211), and the first connecting portion (15), the annular gasket (6) and the second The connecting part (211) is fastened and connected by a bolt (7), and the outer wall of the bolt (7) is provided with a threaded part (71), and the said threaded part (71) is composed of a corresponding left-handed thread and a right-handed thread, The bottom end of the bolt (7) protrudes from the outside of the first connecting portion (15), and the bottom end of the bolt (7) is connected with a fastening nut (8) that cooperates with a left-handed thread, and a right-handed screw thread. A lock nut (9) that is screwed together, and the fastening nut (8) is arranged between the first connecting part (15) and the lock nut (9). 2. The two-position two-way solenoid valve with improved structure according to claim 1, characterized in that: the pilot assembly also includes a static iron core (22), a moving iron core (23) and a coil assembly (24), the A static iron core (22) is fixed inside the casing (21), and a valve chamber (3) is formed by cooperation between the valve body (1), the casing (21) and the static iron core (22). The air inlet (11) and the air guide hole (13) are all communicated with the valve cavity (3), and the moving iron core (23) is movably arranged in the valve cavity (3), and the moving iron core (23) and the static iron A moving iron core spring (25) is arranged between the cores (22), and the bottom end of the moving iron core (23) is fixedly connected with a sealing plug (231) sealingly matched with the air guide hole (13). The coil assembly (24) is arranged outside the casing (21). 3. The two-position two-way solenoid valve with improved structure according to claim 2, characterized in that: the outer wall of the moving iron core (23) is provided with several air guide grooves (232) in the axial direction, and the air guide The slot (232) runs through both ends of the moving iron core (23). 4. The two-position two-way solenoid valve with improved structure according to claim 1, characterized in that: the diameter of the fine hole (51) is 1-3 mm. 5. The two-position two-way solenoid valve with improved structure according to claim 1, characterized in that: the annular gasket (6) is made of rubber material, and the annular gasket (6) The thickness is 5-8 mm.